Title: Scrutinizing the evidence for N ( 1685 )

Abstract

The helicity-dependent observable E for the reaction γd → ηn(p) with a spectator proton was recently measured in this paper by the A2 Collaboration at MAMI in Mainz. The data were interpreted as further evidence for a narrow resonance with spin and parity J P = 1/2 + (P 11 wave). However, a full partial-wave analysis without any narrow resonance leads to an excellent description of the data. Finally, imposing a narrow resonance with the properties suggested by the A2 Collaboration leads to a significant deterioration of the fit quality: there is no need for a narrow resonance.

@article{osti_1391858,
title = {Scrutinizing the evidence for N(1685)},
author = {Anisovich, A. V. and Burkert, V. and Klempt, E. and Nikonov, V. A. and Sarantsev, A. V. and Thoma, U.},
abstractNote = {The helicity-dependent observable E for the reaction γd → ηn(p) with a spectator proton was recently measured in this paper by the A2 Collaboration at MAMI in Mainz. The data were interpreted as further evidence for a narrow resonance with spin and parity JP = 1/2+ (P11 wave). However, a full partial-wave analysis without any narrow resonance leads to an excellent description of the data. Finally, imposing a narrow resonance with the properties suggested by the A2 Collaboration leads to a significant deterioration of the fit quality: there is no need for a narrow resonance.},
doi = {10.1103/PhysRevC.95.035211},
journal = {Physical Review C},
number = 3,
volume = 95,
place = {United States},
year = {Thu Mar 30 00:00:00 EDT 2017},
month = {Thu Mar 30 00:00:00 EDT 2017}
}

By analyzing 2.93 fb-1 of data taken at the ψ (3770) resonance peak with the BESIII detector, we measure the branching fractions for the hadronic decays D +→Kmore » $$0\atop{S}$$K$$0\atop{S}$$K +, D +→K$$0\atop{S}$$K$$0\atop{S}$$π +. D 0→K$$0\atop{S}$$K$$0\atop{S}$$ and D 0→K$$0\atop{S}$$K$$0\atop{S}$$K$$0\atop{S}$$.« less

By analyzing 2.93 fb-1 of data taken at the ψ (3770) resonance peak with the BESIII detector, we measure the branching fractions for the hadronic decays D +→Kmore » $$0\atop{S}$$K$$0\atop{S}$$K +, D +→K$$0\atop{S}$$K$$0\atop{S}$$π +. D 0→K$$0\atop{S}$$K$$0\atop{S}$$ and D 0→K$$0\atop{S}$$K$$0\atop{S}$$K$$0\atop{S}$$.« less

By analyzing 2.93 fb-1 of data taken at the ψ (3770) resonance peak with the BESIII detector, we measure the branching fractions for the hadronic decays D +→Kmore » $$0\atop{S}$$K$$0\atop{S}$$K +, D +→K$$0\atop{S}$$K$$0\atop{S}$$π +. D 0→K$$0\atop{S}$$K$$0\atop{S}$$ and D 0→K$$0\atop{S}$$K$$0\atop{S}$$K$$0\atop{S}$$.« less